In a Citrix Presentation Server environment using TWAIN redirection, users may be unable to close the scanner settings dialog box, forcing them to restart their OnBase and Citrix sessions.
This issue may occur if the scanner uses TWAIN redirection with a version of Citrix Presentation Server that doesn't allow the dialog box to close. Citrix fixed this issue in Hotfix Rollup 1 for Citrix Presentation Server 4.5 and Citrix Client 10.1.
For different versions of Citrix, enabling low TWAIN mode can address the issue. Low TWAIN mode is enabled in the EpicIntegrations.config file on the local workstation. To enable low TWAIN mode: